A guide about how to configure and use the X11 keyboard system by Doug Palmer. The opening quotes say it all:

“Oh yes. I’ve been through there on my trip around the image. The giant vaulted Klein bottles covered with mosaics of other, different, Klein bottles . . . the rows of gargoyles on the roof, each holding a sign reading “See Previous Gargoyle” . . . the little food stands around the base, where they sell you food stand vouchers, redeemable for food stand vouchers at all food stands except this one . . . the hall of the penitents . . . the giant Romanesque stained glass windows, built out of thousands of tiny LooksLike blocks, lit from behind by the radiance of the great Aka . . .
Truly one of the architectural wonders of our age. I’ve been there alright. And I bought
postcards.”

Steve Taylor, talking about software completely unrelated to XKB

“Before you read this, please understand that I never wanted to write this document, being
grossly under-qualified, but I always wanted to read it, and this was the only way.”

Paul “Rusty” Russel

It was originally hosted in:

https://web.archive.org/web/20120320232856/http://www.charvolant.org/~doug/xkb/